Home / 28,105.22-42,178.60-13,314.20

Finding the Fourth Proportional to 28,105.22, 42,178.60 and 13,314.20

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Solution

The fourth proportional to 28,105.22, 42,178.60 and 13,314.20 is: 19,981.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,105.22 : 42,178.60 = 13,314.20 : x
  2. Step 2: Convert to fraction form
    28,105.22/42,178.60 = 13,314.20/x
  3. Step 3: Cross multiply
    28,105.22x = 42,178.60 × 13,314.20
  4. Step 4: Simplify right side
    28,105.22x = 561,574,316.12
  5. Step 5: Solve for x
    x = 561,574,316.12/28,105.22
  6. Step 6: Final answer
    x = 19,981.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.